Door-operating mechanism



C. ALBRECHT, JR.

noos OPERATING MEcHAmsM. APPUCATION FILED IAN. I6, i920.

1,366,236, Patented Jan. 18, 1921.

3 SHEETS-SHEET l @Houma C. ALBRECHT, Jn.

DOOR'OPERATING MECHANISM.

APPLVICATION man .IAN.16. 1920..

1,366,236. Patented Jam 18,1921.

3 SHEETS-SHEET 2.

N A '/fl C. LBRECHT, JR.

DOOR OPERATING MVECHVANISM. APPLICATION man 1Ar 1.ls.192o.

Patented Jams, 1921.

33134 hmmm cHAaLEsfALBREcnT, JR., or; scHLEIsiNenRVILLE, WISCONSIN."

Doon-creanme irncnamsm. y

Specication of Letters Patent. i "Patented 1315185 1921.

y. "y.ipiniaami` fried :ranaayy 163920. semina. saisie To all whom tflaag/ conceive? Be it known that I, Cimnrnsllnniiorrr,

Jr., a citizen of the United Statesglresiding" at Schleisingerville, inthe county1 of `Wash ington and State of V\7iscons1n,"have"1nvented newand `useful lmprovements fin Door-Operating Mechanism, of `which thefollowing` is aspeciication,

This invention relates to door "operating` mechanism of the class whichreleases the latch mechanism and swings the doors to n open position `bythe weightbf the vehicle on a movable platform.' y

The present invention is an improvement over that patented by meonFebruary 19, 1918, No. 1,257,172 and the object of this invention isto simplify the construction and improve the operation ofthe apparatusshownin said patent. j y u Another object of this invention is `toprovide means. for operating doors that swing outwardly instead ofinwardly". l l.

This invention. also consists in certain other features of constructionand in the combination and arrangement of the several partstobehereinafter fully described, illustrated in the accompanying` drawings`and specifically pointed out in the appended claims. i y l Tndescribing` my inventioninfdetail, reference will be had to the`accompanying drawings wherein like characters denote like orcorresponding parts throughout the `several views, and in which y Figure1 is a planview of the invention. Fig. 2 is a vertical section insideeleva- `tion of the same.

Fig. 3 is an enlargedplan view. y `F ipp/1 is an enlarged frontelevation. Fig. 5 is a detailview of the connecting rods for connecting`the cam levers to the crank shaft. y

Figr. 6 is a detailview Fig. 7 is a detail view of the rod forpreventing; the-one door from closing n"before the other. w' n .y n yFig. S. is a detail plan view showinga modification. 1 i

Fig. 9 is a view of the crank 17.

In these views 1 indicates the door frame y to which the doors 2 and 3are hinged. The door 2 is provided with` an overlapping` strip` 2against which the door 3 abuts. The door 3 is provided with a springlatch `3 at its top and bottom for locking `the doors in closedposition.

@rastrear aaa.

A recess 4 is formed inthe roadway lead- "ing through the door andiextending toward either "side thereof. This recess is bridged `by thevertically movable platform 5. This platform is supported by means ofthe cam members G, secured to itsiunder faceandfslid- `mgly engaging thestandards 7located in y the recess. The cams are slotted as `at 8 andVtheseslots engage the bolts 9 carried by the standards. Springs 10engage brackets 11 carried by the standards and have their upper endsengaging projections 12 of the cams tend to hold the platform in itsupper position. `lfnclined pieces 13 arehinged to the ends of theplatform for permitting thc vehicle to pass from the road surface` on tothe platform. Levers 14 have their lower ends "pivotally` mounted tothelower ends of the standards and these levers have inclined `upperportions and these portions are pivoted to the forked ends of theconnecting arms` 15; A crank shaft 16 `isjournaled below; the platformand its adjustable crank 17 is connected with the inner ends of theconnecting arms 15. These arms are formed of two pieces, each providedwith 'a plu-` ralityl of perforations Eto receive connecting bolts sothat the two pieces may be adjustably connected together.` Thisformation of the connecting arms is shown in detail in Filer. 5. Thecrank shaft 16 isprovided with a crank H18 at each end thereof` andthese cranks are adjustably connected to the shaft by means of the boltsand plurality of holes .formed in the shaft. As `will be seen from Fig.6 the shaft is also provided with a plu-` rality of holes to receive thebolt which holds the crank 17 in place. I prefer to make the sha-ft oftubingand as will be seen the three cranks may shaft. 1 n i y Alink 19is adjustably connected. to each of the cranks 18 and a hook 2()` isadjustably connected to each link.

be adjusted imposition on said An angle bracket 21 `is connected witheach door and the brace 21..of this bracket carries small` pulley 22andthe outer. end

` of the bracket carries apulley 23.v A pulley 24:` 'isswuner to onewalladjacent the door opening. The cable25 has oneend connected with thehook 20 and passes upwardly throurh` the pulley 24: then `over thepulley 23ran over pulley 22and` this `cable is con-` nected withthe pairof cables 26 which pass over the guide pulleys 27 carried by thedoor 3and the ends of these cables are connected,

j with the latches e. A SmauV Step es is yso placed onthe cable 25between the pulleys Y 22 and 23 and this stop is so located with refspect to pulley 23 that the firstpull on the pulley 25 will cause thecable 2G toy retract the'latehes 3f and then'said stopv will strikel`rthe vpulley and thus lock Ythe cable to the bracket so that furthermovement of the cable will cause the door to swing open.

Then the door 2 is no'tprovided with a latchthe cable for this door issimply attached to the door and the stop: 28 is not required., s

It rwill thus loe seen that as the vehicle Vmoves uponl the platform itsweight will 'lower'the platform and the cams willvdepress the levers 14and thus rock the crank shaft. This movement of the crank shaft willcause its crank armsl to pull on the cables and cause the cablestounlatch the doors and swingthem open as before stated. After Vthevehicle leaves the platform the doors are swung sluit by means of theWeights 29 which are vattached to the doors bythe cables 30, said cablesvpassing over the guide pulleys 31. Y

. In order to prevent the door 3 from closing before door 2 I place arod'32 on the door 'lintelrwhich has one end bent down- Ward-lyY andcurved as at 33 and it-s other end is bent'outwardly and provided with arubber tip 34. The bar is so placed that the part 33 will be struck bydoor 2 as it swings shut whilefthe'partt willlprevent the door 3lfrom-'closing to a sufficient degree to prevent the door 2 closing.VWhen the part 33 .Y of rod 32 is struck by the door 2 the rod 32 willbey rockedso. as'to move the part 34 out of the pathl of door 3V so thatsaid door will closea'fter door 2.v j

Where theV doors are hung, to swing outfwardly as 'shownf in 1F ig. 8 vIplace the bracket A on the outerl edge rof each door and have the cablespass through openings 36 formed vin the wall adjacent the door opening.vThe ends ofthe cables may be attached to'V theouter part of thebrackets though .they mayY be passed over said brackets and' connectedwith the door. 'In any event the pull of the cable would beion theprojecting part of the brackets. In this Ycase the means Vfor unlockingthe door V conslsts ofan `L-ishape'd vlever 3*(A pivoted at thejunction. oflt's armsto a bracket 38 which is vsecured atthe dooradjacent its hinged edge. The end of the small arm of thi'sleverV isconnected with thev latches'V by means ofthe cable 39` and the end ofits long arm is located in the top of the link 19 so that as said linkis ,swung 'outwardly by the movement of` thel crank 'shaft it willstrike saidl'flongarni of theA lever so as to rotate `Vsaid lever. fromits pivot and thus cause the cablY orfcab'l'e's to retract the latchesand permit 'the doors to open.

jacent its hinged edge, a pair of pulleys on said bracket, one of whichis located adjacent the outer, end thereof7 a vertically movableplatform adjacent the door frame, a cable adapted to vbe pulled upon bythe depression of the platform, said cable passing over the pulleys. aylatch for the door to which the cable is connected and a stop ou thecable located be-tween the pulleys` for engaging the outermost pulley tocause the pull on the cable to open the door.

2. In a device of the character described the combination with a doorframe. of a door hingedly mounted therein, a \f'ertieall.\rv movableplatform located adjacent the door frame. cam members carried by lrtheplatform, levers operated by the cams. a crank shaft located below theplatform, crank arms adjustably mounted on said shaft, adjustableconnecting rods connecting the levers with said crank arnxs and dooropening means connected with the said crank shaft.

3. .In a device of the character described. the combination with a doorframe. of a door hingedly mounted therein7 a vertically movable platformlocated adjacent the door frame, cams carried by said platform. leversactuated by said cams, a crank shaft located below the platform,adjustable connecting rods connecting the shaft with the levers, saidrods having forked ends eonnected with the levers and means forconnecting the door with the crank shaft whereby the rocking movement ofthe shaft will cause the door to open.

4L. In a device of the 'character described. the combination with a doorframe, of a pair of doors hingedly mounted therein and means forpreventing one of said doors from lclosing before the other` such meansconl Uf)

